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At each moment during its flight, a projectile has a velocity v and an acceleration a. The components of these variables are: vx = x component of the velocity vy = y component of the velocity ax = x component of the acceleration ay = y component of the acceleration Which of these components remain constant throughout the motion? Assume that air resistance is absent. Only vx and ay are constant. None of the variables is constant. vx, ax and ay are constant. vy, ax and ay are constant Only ax and ay are constant.
200 Btu are transported into a system via a work mode and 75 Btu are removed via heat transfer mode. Determine the net energy gain for this system
Consider a three dimensional rectangular infinite potential well with sides of length L, 2L and 3L. What is the energy of the first excited state relative to the energy of the ground state
A golf ball is struck with a five iron on level ground. It lands 92.7 away 4.10 later. What were (a) direction and (b) magnitude of the initial velocity.
A solar cell generates a potential difference of 0.320 V when a 445.0 ? resistor is connected across it and a potential difference of 0.504 V, find the internal resistance of the cell in Ohms
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." what is the "hang time"
A series circuit with R=100ohms, L=.5H and C=50 MuF is driven by an ac signal of frequency 75 Hz and amplitude of 18V. what are the rms values of the voltage and current
A building in San Fran has light fixtures consisting of small 2.35kg bulbs with shades hanging from the ceiling at the end of lightthin cords 1.5 m long. If a minor earthquake occurs, how many swings per second will these fixtures make?
When a 9.0 V battery is connected to a capacitor, it puts 8.00e-4 C of charge on the capacitor. What is the unknown battery's voltage
Calculate the energy of a photon required to excite a hydrogen atom from the n = 5 state to the n = 6 state
A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of mass m, moves with velocity v in the negative x direction, what is the magnitude of the velocity of the third piece
After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 1.69 km away. What distance did the dog run
A yo-yo has a rotational inertia of 1140 g·cm2 and a mass of 81.3 g. Its axle radius is 3.27 mm, and its string is 106 cm long, What is the magnitude of its linear acceleration, rotational kinetic energy
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